To give people the opportunity to practice proper and sharp cuts, an iron wheel - 2 feet [1] in diameter, in which narrow incisions for cuts can be found - proves to be useful (Figure 6). This wheel is screwed on an iron arm, 1 ½ feet in length, so it stands free at a man's height [2]. Flat cuts cannot enter into narrow incisions (slots).

1. I don't know the exact length in mm of a German (Prussian, to be precise) foot around 1830. For simplicity let's assume it equals an English foot.

2. My German is far from perfect, but in my understanding "und ringsum frei ist" means that the space around the device must be free of obstacles = there must be enough free space to perform cutting drills.

So I would assume that they used a non-rotating metal disk, sturdy enough to withstand constant abuse, mounted far enough from the wall to prevent damaging of the tips. Soldiers performed cutting drills on this device with rebated regulation swords, and probably were instructed to cut with COP of their weapons.

If we measure details on Fig. 6 and assume that 83 mm on the screen (diameter of the device) equals 61 cm IRL, then a slot could be 23 cm in length, 5.4 cm at the entrance and 1.4 cm at the end. So after some practice a soldier could manage to lead his cuts into such a slot, without any difficulties.